administering vitamin b12 injections Injection Sites: All You Need to Know Best Vitamin B12 Injection Sites:

The presence of blood should never be ignored

PMID 24344881

As we age, our stomachs produce less acid, which makes it harder to absorb B12 from food

[5] Vitamin B 12 is the most chemically complex of all vitamins, [2] [6] [7] and is synthesized exclusively by certain archaea and bacteria

Some of the serious side effects of Vitamin B12 include serous allergic reaction, narrowing or blocking of blood vessels, thrombocytosis (a disorder where your body produces too many platelets), low potassium levels in body, pulmonary edema (a condition where there is excess fluid in the lungs) and congestive heart failure

Hydroxocobalamin provides a longer-acting effect compared with oral B12 supplements, which reduces the frequency of dosing